<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo1.jpg" alt="">
            </div>
            <!-- 登录表单区域 -->
            <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
                <!-- 用户名 -->
                <el-form-item  prop="username">
                <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                <el-input v-model="loginForm.password" @keyup.enter.native="login" prefix-icon="iconfont icon-3702mima" type="password" :show-password="true"></el-input>
                </el-form-item>
                <!-- 按钮 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click='login'>登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
  data () {
    return {
      // 这是登录表单的数据绑定对象
         loginForm: {
            username: 'admin',
            password: '123456'
         },
         // 表单验证
         loginFormRules: {
             username: [
                { required: true, message: '请输入用户名', trigger: 'blur' },
                { min: 3, max: 13, message: '长度在 3 到 13 个字符', trigger: 'blur' }
             ],
             password: [
                { required: true, message: '请输入密码', trigger: 'blur' },
                { min: 6, max: 18, message: '长度在 6 到 18 个字符', trigger: 'blur' }
             ]
         }
    }
  },
  methods: {
      // 点击重置按钮 重置登录表单
      resetLoginForm() {
        //   console.log(this);
        this.$refs.loginFormRef.resetFields();
          
      },
      login() {
          this.$refs.loginFormRef.validate(async(valid) => {
            //   console.log(valid);
            if(!valid) return;
           const {data: res} = await this.$http.post("login", this.loginForm)
            //   console.log(res);
              if(res.meta.status !== 200) return  /* console.log('登录失败');  */ this.$message.error('登录失败!')
             /*  console.log('登录成功'); */ this.$message.success('登录成功')
             // 1. 将登录成功之后的 token, 保存到客户端的 sessionStorage 中
             // 1.1 项目中除了其他登录之外的API接口, 必须在登录之后才能访问
             // 1.2 token 只能在当前网站打开是生效, 所以讲将token保存在 sessionStorage中
            //  console.log(res);
             window.sessionStorage.setItem('token', res.data.token)
             // 2. 通过编程式导航跳转到后台主页, 路由地址是 /home
             this.$router.push("/home")
          });
      }
  }
}
</script>

<style lang="less" scoped>
.login_container {
    background-color: #2b4b6b;
    height: 100%;
}
.login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
.avatar_box {
    position: absolute;
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    left: 50%;
    transform:translate(-50%, -50%);
    background-color: #fff;
    img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
    }
}
.btns {
    display: flex;
    justify-content: flex-end;
}
.login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}
</style>
